/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/MeshNormalsFunctions.h
Recompute the normals of TargetMesh by averaging the triangle/face normals around each vertex, using combined area and angle weighting. Each vertex will have a single normal, ie there will be no hard edges.
static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * SetPerVertexNormals ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, [UGeometryScriptDebug](API\Plugins\GeometryScriptingCore\GeometryScript\UGeometryScriptDebug) * Debug )